Adjustable post



Patent.

' any i, tra

JAMES H. sTEnBINs, or WATERLOO, Iowa ADJUSTABLE POST.

Application led October 25, 1923. Serial No. 870,722.

To all whom it may concern.'

Be it known that I, JAMES H. STEBBINs, a citizen of the United States of America,

and a resident of Waterloo, Blackhawk County, Iowa, have invented certain new and useful Improvements in Adjustable Posts, of which the following is a speciiication.

My. -invention relates to improvements in adjustable posts, and the object of my improvement is to supply posts of the type which have relatively adjustable members furnished with means for varying their relative positions and releasably securing them together in their adjusted positions, one of the members lbeing-used to support an implement or appliance such as a vise, so that the post device may be set up and iixedly secured in any convenient place.

This object'I have accomplished by the means which are hereinafter described and claimed, and which are' illustrated in the accompanying drawings, it being under-` stood that changes in the precise embodiment of invention herein can be made withinthe scope of what is claimed without departingv from the spirit of the invention.

In said drawings, Fig. 1 is an elevation of'my improved adjustable post as mounted between xed supports, and as carrying on one of its inembers` detachably, a vise. Fig. 2 is a fragmentary front elevation on an enlarged scale, of the upper portions of my device, with parts sectioned or broken away. Fig. 3 is a fragmentary side eleva- 'tion of the same parts'of the device, partly in central longitudinal section, and having other parts broken away. Fig. 4 is a plan of the .upper pivoted clutch element, and

Fig. 5is a cross section of this element taken through, the medial opening therein.

j My improved adjustable post is made up .of twotelescoping outer and inner elongated membersrl and 5; respectively, the member 5 being preferably solid and having aconed upper'end 6 to engage an overhead beam or. fixed support, the lower member 1 'being tubular and having feet A2 to lrest on any vsuitable fixed base. A vise 3 or -any other body or, appliance vto be supported for convenient use may be clamped upon the lower member 1 removably. The

. numeral 4 denotes a hollow housing element,

having a rectangular hollow 10 open .at opposite sides, and has a tubular depending part 8 which is forced tightly upon or otherwise xedly mounted On the upper end of thelower post member 1. In the housing 4 are longitudinally alined openings, as at 9 to slidably receive and fit about the cylindrical post element 5 whose lower part may also pass into the hollow of the lower element l of the post. The housing 4 has a pair of integral brackets 7 projecting forwardlyin parallel from it laterally and the brackets have alined bearing holes to receive respectively the end parts of pintles 12 and 18, to rock therein. The lower pair of openings '19 openinto inclined slots 17, into which the pintles 18 may be withdrawn forwardly as hereinafter described.

" The numeral 13 denotes a clutch-plate from whose Opposite longitudinal edges at one end the said pintlesy12 pro'eot into the u per pair of bearing holes. s shown in igs. 4 and 5, this plate, which is swingingly positioned across the upper part of the hollow of the housing 4, hasa central vertical circular opening 14 which is loosely traversed by said post yelement 5 when the plate- 13 is substantially horizontal or at a rlght angle to the element 5. Smaller holes 23 are drilled through the plate to the front and rear of the central hole 14 in the median line ofthe plate to intersect the wall of said hole 14 thus providing two opposite pairs of sharp angular detente or angles 15A extending vertically, so that when the plate 13 swings downwardly under the action of gravity, the detente at upper and lower' corners thereof engage and clutch the element 5 and hold it securely in an adjusted position relative to said lower post element 1.

A like clutch-plate 16 is swinglngly mounted within thelower part of the hollow 10 of the housing 4, but haspno pintles such as the pintles 12. This plate has a duplicate set vof o enings 14 and 23 to releasl end of the lastrmentioned clutch-plate to ensaid element in one position and having opgage saine alternately lwhen tbe levieru is positely positioned pointed detents to enswung reversely to vreleasabl clutch saidy gage and clutch samerreleasably in another late and lift said elongated e ement and rel() position, and a lever fulcrumed on said housease it by a step by step actuationA thereon. 5 ing land. having .a terminal fork whose Signed at Waterloo, Iowa, this 23rd day prongs are aboveand below the adjacent Y of October, 1923.

JAMES H. STEBBINS. 

